cogongrass

Plants: Grass or Grasslike
Liliopsida > Cyperales > Poaceae > Imperata cylindrica (L.) Beauv.
Synonym(s): cogon grass, alang-alang
Cogongrass is a perennial, colony-forming grass which can grow up to 6 ft. (1.8 m) tall. Leaves have an off-center, whitish midrib and finely serrated margins. Leaves are up to 6 ft. (1.8 m) long, 0.5-0.75 in. (1.3-1.9 cm) wide, stiff, and have a sharp, pointed apex. Rhizomes are whitish, branched, scaly and sharp at the tips. Cogongrass is best identified in the spring by the large fuzzy panicle of flowers and seeds, giving the plant a cottony or silky look. Flower heads are 2-8 in. (5.1-20.3 cm) long, silvery-white and cylindrical. Cogongrass is an extremely aggressive invader with the capability of invading a range of sites. It forms dense, usually circular infestations that exclude all other vegetation. Cogongrass is native to Southeast Asia and was accidently introduced into the southeast United States in packing material in the early 1900s. It was also intentionally introduced for erosion control and livestock forage.

358 records

<View Images as Host>

<View Thumbnails>

Image Descriptor Description Photographer
1391432 Biological Control Rhizoctonia disease John D. Byrd
1391433 Biological Control Rhizoctonia disease John D. Byrd
1391434 Biological Control Rhizoctonia disease John D. Byrd
0016199 Competition James H. Miller
0016382 Control Herbicide application of glyphosate (Accord) 35 days after treatment. Application in September using 20 gpa. James H. Miller
1115009 Control Wetblade mower Charles T. Bryson
1115010 Control Wetblade mower Charles T. Bryson
1148137 Control Art Miller, USDA APHIS PPQ, spraying herbicide USDA APHIS PPQ Archive
1148138 Control wetblade mower USDA APHIS PPQ Archive
1148139 Control wetblade mower USDA APHIS PPQ Archive
1148140 Control wetblade mower USDA APHIS PPQ Archive
1148141 Control wetblade mower USDA APHIS PPQ Archive
1151005 Control Terry English
1391427 Control John D. Byrd
1391140 Control Burch wetblade application John D. Byrd
1391141 Control Burch wetblade application John D. Byrd
1391142 Control Burch wetblade application John D. Byrd
1334102 Control glyphosate mixture. Bainbridge, GA Chris Evans
1334104 Control glyphosate mixture. Bainbridge, GA Chris Evans
2155060 Control Deep disking John D. Byrd
2155061 Control Deep disking John D. Byrd
2155057 Control Deep disking John D. Byrd
2155058 Control Deep disking John D. Byrd
5371421 Control

spraying with glyphosate.

Carey Minteer
5371422 Control

spraying with glyphosate

Carey Minteer
5371426 Control

after being sprayed with glyphosate.

Carey Minteer
5371427 Control

infestation after 3 years of treatment with glyphosate.

Carey Minteer
5371428 Control

Previously infested field after three years of treatment with glyphosate.

Carey Minteer
5371431 Control

Same area as this image after 3 years of treatment with glyphosate.

Carey Minteer
5371432 Control

Same field as this image after three years of treatment with glyphosate.

Carey Minteer
5371433 Control

same area as this image after three years of treatment of glyphosate.

Carey Minteer
5371435 Control

Resprouting after treatment with glyphosate.

Carey Minteer
5371436 Control

resprouting aftet treatment with glyphosate.

Carey Minteer
5405114 Demonstration

Echols County

Karan A. Rawlins
5405115 Demonstration

Echols County

Karan A. Rawlins
5405127 Demonstration

Echols County; Joseph LaForest demonstrating

Karan A. Rawlins
5405128 Demonstration

Echols County; Joseph LaForest demonstrating

Karan A. Rawlins
5405143 Demonstration

Echols County; sharp rhizomes

Karan A. Rawlins
5405144 Demonstration

Echols County; Dr. David Moorhead demonstrating

Karan A. Rawlins
5405145 Demonstration

Echols County

Karan A. Rawlins
5405146 Demonstration

Echols County; blades have sharp edges

Karan A. Rawlins
5405147 Demonstration

Echols County: Dr. David Moorhead demonstrating

Karan A. Rawlins
5405156 Demonstration

Echols County; Dr. David Moorhead demonstrating

Karan A. Rawlins
5405164 Demonstration

Echols County

Karan A. Rawlins
2132048 Diagram or Graphic David J. Moorhead
2131089 Dispersal

Stuck in radiator of tractor

Mark Atwater
3970059 Distribution general distribution throughout the world depicted by areas of white (based on information from Holm et al., 1997) Andrea Van Loan
3970060 Distribution general distribution in the United States depicted by area in red Andrea Van Loan
3970061 Feature(s) portion of leaf blade showing off-center midrib and scabrous leaf margins L. M. Marsh
3970062 Feature(s) high levels of disease and damage severity in a mini-plot following treatment with a potential mycoherbicide consisting of a formulation of Bipolaris sacchari fungal spores, an oil emulsion and water. Camilla B. Yandoc
2308122 Feature(s) L. M. Marsh
2912046 Feature(s) Jeffrey W. Lotz
2155059 Feature(s) Rhizomes John D. Byrd
2307196 Feature(s) September James H. Miller
2308082 Feature(s) Clump of rhizomes. Craig Ramsey
2186086 Feature(s) Plant Base Richard Carter
2186088 Feature(s) Plant Base Chris Evans
2307191 Feature(s) September James H. Miller
2307192 Feature(s) September Ted Bodner
2120069 Feature(s) Rhizomes Chris Evans
2120070 Feature(s) Chris Evans
2132088 Feature(s) Leaf-collar region Mark Atwater
2132089 Feature(s) Sharp-pointed rhizome Mark Atwater
2912048 Feature(s) L. M. Marsh
3970057 Feature(s) Far left, a partial plant showing stems, leaves, roots and elongating rhizomes. Middle, a stem with leaves. Far right, plume-like inflorescence of many paired flowers L. M. Marsh
3970058 Feature(s) a severe infestation in a longleaf pine upland in central Florida James R. Meeker
1334119 Feature(s) Off-center midrib. Mitchell County, GA Chris Evans
1334120 Feature(s) The whitish midribs are often off-center. Mitchell County, GA Chris Evans
1343004 Feature(s) Whitish, off-center midrib. Mitchell County, GA Wayne Williamson
1380054 Feature(s) Rhizomes Chris Evans
1380055 Feature(s) Pointed rhizomes Chris Evans
1380056 Feature(s) Collar region Chris Evans
1380057 Feature(s) Pointed rhizome Chris Evans
1380058 Feature(s) Pointed rhizomes Chris Evans
1380059 Feature(s) Ligule Chris Evans
1380060 Feature(s) Collar region Chris Evans
1380061 Feature(s) Segmented rhizome Chris Evans
1380062 Feature(s) Segmented rhizome with outer covering intact (bottom) and removed (top) Chris Evans
1380063 Feature(s) Segmented rhizomes with outer covering intact (bottom) and removed (top) Chris Evans
1391428 Feature(s) Rhizome John D. Byrd
2120072 Feature(s) Rhizomes Chris Evans
2120073 Feature(s) Rhizomes Chris Evans
2120074 Feature(s) Rhizomes Chris Evans
1197015 Feature(s) Dispersal via soil in equipment Charles T. Bryson
1197020 Feature(s) Dispersal via soil in equipment Charles T. Bryson
1237046 Feature(s) Pointed rhizome Wilson Faircloth
1237049 Feature(s) Seed head Wilson Faircloth
1237050 Feature(s) Comparative morphology Ludovic Capo-chichi
1120336 Feature(s) Off-center midrib. September. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society. Ted Bodner
1120339 Feature(s) Off-center midrib. September. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society. Ted Bodner
1120343 Feature(s) Overlapping leaf sheaths. September. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society. James H. Miller
1115003 Feature(s) "Red Baron" Charles T. Bryson
0908093 Feature(s) portion of a leaf blade, showing the off-center midrib and the scabrous leaf margins. Jeffrey W. Lotz
0016150 Feature(s) closeup sheath with hairs in September James H. Miller
0016152 Feature(s) plant base and rhizomes in September James H. Miller
0016153 Feature(s) Seedheads (whitish plumes) and flower heads in April James H. Miller
5405148 Feature(s)

Echols County; white off center midrib on leaf

Karan A. Rawlins
5405149 Feature(s)

Echols County; white off center midrib of leaf

Karan A. Rawlins
5389532 Field Nancy Loewenstein
2132091 Flower(s) Mark Atwater
2131087 Flower(s) Mark Atwater
2131088 Flower(s) Mark Atwater
2131097 Flower(s) Chris Evans
2186089 Flower(s) Chris Evans
2186087 Flower(s) Mark Atwater
2155055 Flower(s) John D. Byrd
2155056 Flower(s) John D. Byrd
2307195 Flower(s) May James H. Miller
2132087 Foliage Showing off-center midrib Mark Atwater
2734037 Foliage showing off-center mid-vein G. Keith Douce
5125040 Foliage Chris Evans
5125041 Foliage Chris Evans
5289099 Foliage Division of Plant Industry Archive
1115013 Foliage Charles T. Bryson
1148079 Foliage new shoot Charles T. Bryson
1380044 Foliage Chris Evans
1380047 Foliage Chris Evans
1380048 Foliage Chris Evans
2131084 Fruit(s) Mark Atwater
2131085 Infestation Mark Atwater
2131086 Infestation Mark Atwater
2132002 Infestation Chris Evans
2131090 Infestation Small infestation in woods Mark Atwater
2131091 Infestation Roadside infestation in flower Mark Atwater
2132092 Infestation Mark Atwater
2148033 Infestation Late March, Central Florida Zhihong Pan
2148034 Infestation Late March, Central Florida Zhihong Pan
2148035 Infestation Mid April, Central Florida Zhihong Pan
2132090 Infestation Mark Atwater
2132052 Infestation David J. Moorhead
2132029 Infestation Mark Atwater
2132046 Infestation David J. Moorhead
2132047 Infestation David J. Moorhead
2308083 Infestation Distinctive circular infestations in harvest stand. Greg Leach
2307198 Infestation September James H. Miller
2155052 Infestation John D. Byrd
2155053 Infestation John D. Byrd
2155054 Infestation John D. Byrd
2188071 Infestation Chris Evans
2188072 Infestation Chris Evans
5289100 Infestation Division of Plant Industry Archive
5290001 Infestation Division of Plant Industry Archive
5345041 Infestation David J. Moorhead
5345079 Infestation David J. Moorhead
5345080 Infestation David J. Moorhead
5368024 Infestation

after being sprayed with glyphosate

Carey Minteer
5368025 Infestation

after being sprayed with glyphosate

Carey Minteer
5368026 Infestation

5 months after being sprayed with glyphosate

Carey Minteer
5362525 Infestation

Infestation approximately 1/2 acre in size.

Carey Minteer
5362527 Infestation

Burn marks on trees from extreme heat produced by flames fueled by cogongrass.

Carey Minteer
5368020 Infestation

after being sprayed with glyphosate

Carey Minteer
5405116 Infestation

Echols County

Karan A. Rawlins
5405117 Infestation

Echols County

Karan A. Rawlins
5405118 Infestation

Echols County

Karan A. Rawlins
5405119 Infestation Karan A. Rawlins
5405129 Infestation

Echols County

Karan A. Rawlins
5392223 Infestation

Infestation in slash pine

John M. Randall
5392224 Infestation John M. Randall
5392225 Infestation

Infestation in slash pine

John M. Randall
5405132 Infestation

Echols County

Karan A. Rawlins
5405133 Infestation

Echols County

Karan A. Rawlins
5405134 Infestation

Echols County

Karan A. Rawlins
5405135 Infestation

Echols County

Karan A. Rawlins
5405137 Infestation

Echols County

Karan A. Rawlins
5405138 Infestation

Echols County

Karan A. Rawlins
1380049 Infestation Chris Evans
1380050 Infestation Chris Evans
1380051 Infestation Chris Evans
1380052 Infestation Chris Evans
1380053 Infestation Chris Evans
1380039 Infestation Chris Evans
1380040 Infestation Chris Evans
1380041 Infestation Chris Evans
1380042 Infestation Chris Evans
1380043 Infestation Chris Evans
1343005 Infestation Infestation within a planted pine stand spreading into the roadside. Mitchell County, GA Wayne Williamson
1343006 Infestation Infestation within a planted pine stand spreading into the roadside. Mitchell County, GA Wayne Williamson
1343007 Infestation Infestation within a planted pine stand spreading into the roadside. Mitchell County, GA Wayne Williamson
1372004 Infestation Winter photo of infestation in planted pine stand. David J. Moorhead
1372005 Infestation Winter photo of infestation in planted pine stand. David J. Moorhead
1372006 Infestation Winter photo of infestation in planted pine stand David J. Moorhead
1334122 Infestation In planted pines. Mitchell County, GA Chris Evans
1380037 Infestation Chris Evans
1334116 Infestation In planted pines. Mitchell County, GA Chris Evans
1334117 Infestation In planted pines. Mitchell County, GA Chris Evans
1334118 Infestation In planted pines. Mitchell County, GA Chris Evans
1380045 Infestation Chris Evans
1380046 Infestation Chris Evans
1391425 Infestation Right-of-way John D. Byrd
1391426 Infestation Showing small infestations in flower John D. Byrd
1391420 Infestation John D. Byrd
1391421 Infestation John D. Byrd
1391422 Infestation John D. Byrd
1391429 Infestation In yard John D. Byrd
1391430 Infestation In flower beds John D. Byrd
1391431 Infestation In yard John D. Byrd
1391435 Infestation In flower John D. Byrd
2130072 Infestation Greg Leach
2130073 Infestation Greg Leach
2130074 Infestation Greg Leach
2130075 Infestation Greg Leach
2130076 Infestation Greg Leach
1391439 Infestation Roadside John D. Byrd
1391440 Infestation Several small infestations in flower John D. Byrd
1461067 Infestation Amy Ferriter
1461068 Infestation Amy Ferriter
1499034 Infestation Tony Pernas
1499084 Infestation Tony Pernas
1624012 Infestation A perennial grass introduced into Louisiana in the early 1900s from the Philippines as a potential cattle forage, is becoming a serious weed of row crops and pine plantations in the Gulf Coast Region. Charles T. Bryson
1120337 Infestation May. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society. Charles T. Bryson
1115001 Infestation In the median. Charles T. Bryson
1115002 Infestation In the median Charles T. Bryson
1148142 Infestation USDA APHIS PPQ Archive
1149014 Infestation USDA APHIS PPQ Archive
1149023 Infestation USDA APHIS PPQ Archive
1149024 Infestation roadside USDA APHIS PPQ Archive
1299003 Infestation

Cogongrass infestation in Mississippi Pine Plantation.

Charles T. Bryson
1299104 Infestation John D. Byrd
1334094 Infestation Bainbridge, GA Chris Evans
1334099 Infestation Bainbridge, GA Chris Evans
1237047 Infestation Large infestation Wilson Faircloth
1237048 Infestation Roadside infestation Wilson Faircloth
1119111 Infestation In Winter Chris Evans
1119112 Infestation In Winter Chris Evans
1119113 Infestation In Winter Chris Evans
1119114 Infestation In Winter Chris Evans
1115004 Infestation Small circular infestation. Charles T. Bryson
1115011 Infestation Charles T. Bryson
0016151 Infestation dormant phase of roadside infestation in January James H. Miller
0016200 Infestation under seedling longleaf pine James H. Miller
0016201 Infestation James H. Miller
0016380 Infestation 20-year old infestation in pine stand. James H. Miller
0016381 Infestation Herbicide test plots bare in 20-year old stand James H. Miller
0016224 Infestation along Interstate 65 James H. Miller
5405150 Infestation

Echols County

Karan A. Rawlins
5405151 Infestation

Echols County

Karan A. Rawlins
5405111 Infestation

Echols County

Karan A. Rawlins
5405112 Infestation

Echols County

Karan A. Rawlins
5405113 Infestation

Echols County

Karan A. Rawlins
5405158 Infestation

Echols County

Karan A. Rawlins
5405159 Infestation

Echols County; Infestation spread by road grading equipment

Karan A. Rawlins
5405160 Infestation

Echols County

Karan A. Rawlins
5405167 Infestation

Echols County

Karan A. Rawlins
5405168 Infestation Karan A. Rawlins
5405169 Infestation Karan A. Rawlins
5405170 Infestation Karan A. Rawlins
5405171 Infestation Karan A. Rawlins
5405172 Infestation Karan A. Rawlins
5405173 Infestation Karan A. Rawlins
5405174 Infestation Karan A. Rawlins
5405175 Infestation Karan A. Rawlins
5405176 Infestation Karan A. Rawlins
5405177 Infestation Karan A. Rawlins
5405178 Infestation Karan A. Rawlins
5405179 Infestation Karan A. Rawlins
5405180 Infestation Karan A. Rawlins
5405181 Infestation Karan A. Rawlins
9005065 Infestation in September James H. Miller
5405161 Inspection

Echols County

Karan A. Rawlins
5405162 Inspection

Echols County

Karan A. Rawlins
5405163 Inspection Karan A. Rawlins
5405165 Inspection Karan A. Rawlins
5405166 Inspection Karan A. Rawlins
5405152 Inspection

Echols County

Karan A. Rawlins
5405153 Inspection

Echols County

Karan A. Rawlins
5405154 Inspection

Echols County

Karan A. Rawlins
5405139 Inspection

Echols County

Karan A. Rawlins
5405140 Inspection

Echols County

Karan A. Rawlins
5405141 Inspection

Echols County

Karan A. Rawlins
5405142 Inspection

Echols County

Karan A. Rawlins
5405136 Inspection

Echols County

Karan A. Rawlins
5405130 Inspection

Echols County

Karan A. Rawlins
5405120 Inspection

Echols County

Karan A. Rawlins
5344082 Red Baron Mark Crosby
4064030 Decatur Co.: near US Hwy 27 bypass, Charter House Inn on East Alice Street, Bainbridge James R. Allison
4064031 Decatur Co.: near US Hwy 27 bypass, Charter House Inn on East Alice Street, Bainbridge James R. Allison
0016222 horses grazing on cogongrass, cogongrass was introduced as a potential forage crop. James H. Miller
0016223 horse eating cogongrass, cogongrass was introduced as a potential forage crop James H. Miller
0016206 deer bedding in dormant grass James H. Miller
1148080 three seedheads Charles T. Bryson
1148078 seedhead Charles T. Bryson
1148136 Plant(s) USDA APHIS PPQ Archive
1120338 Plant(s) September. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society. Ted Bodner
1149012 Plant(s) USDA APHIS PPQ Archive
1149013 Plant(s) USDA APHIS PPQ Archive
1237063 Plant(s) Planted "Red Baron" variety David Teem
0016154 Plant(s) whole plants in September Ted Bodner
0908094 Plant(s) note the flowering plant at the center back Jeffrey W. Lotz
1115012 Plant(s) "Red Baron" ornamental planting Charles T. Bryson
1115005 Plant(s) Charles T. Bryson
1115006 Plant(s) Ornamental planting Charles T. Bryson
1115007 Plant(s) Research stand Charles T. Bryson
1115008 Plant(s) "Red Baron" variety in a greenhouse Charles T. Bryson
1115014 Plant(s) "Red Baron" Charles T. Bryson
1115015 Plant(s) Charles T. Bryson
1115016 Plant(s) "Red Baron" ornamental planting Charles T. Bryson
1115017 Plant(s) "Red baron" ornamental planting Charles T. Bryson
2912047 Plant(s) Jeffrey W. Lotz
2307193 Plant(s) September Ted Bodner
2307194 Plant(s) January James H. Miller
2132023 Plant(s) James H. Miller
2120071 Plant(s) Chris Evans
5345082 Plant(s) David J. Moorhead
5302012 Plant(s) Chris Evans
5302013 Plant(s) Chris Evans
5125042 Plant(s) Chris Evans
5289098 Plant(s) Division of Plant Industry Archive
5368021 Plant(s)

after being sprayed with glyphosate

Carey Minteer
5368022 Plant(s)

after being sprayed with glyphosate

Carey Minteer
5368023 Plant(s)

after being sprayed with glyphosate

Carey Minteer
5362526 Plant(s) Carey Minteer
5371430 Plant(s)

Immediately after being sprayed with glyphosate.

Carey Minteer
5371434 Plant(s)

After glyphosate treatment

Carey Minteer
5405131 Plant(s)

Echols County

Karan A. Rawlins
9005066 Plant(s) upright in September James H. Miller
5371419 Plant(s)

Resprout after treatment with glyphosate.

Carey Minteer
2131096 Prescribed Fire Prescribed fire to reduce thatch. Chris Evans
2132003 Prescribed Fire Burnt to remove thatch layer Chris Evans
2132004 Prescribed Fire Burnt to remove thatch layer Chris Evans
2132005 Prescribed Fire Burnt to remove thatch layer Chris Evans
2132006 Prescribed Fire After a prescribed fire to remove thatch layer Chris Evans
2155034 Prescribed Fire John D. Byrd
2155035 Prescribed Fire John D. Byrd
2155036 Prescribed Fire John D. Byrd
5078025 Prescribed Fire Prescribed fire to remove thatch before herbicide application David J. Moorhead
0016379 Prescribed Fire Infestation in 20-year old pine stand. Fire used to reduce fuel hazard. James H. Miller
0016207 Prescribed Fire Burn in infested stand James H. Miller
1391424 Research Control plots John D. Byrd
1391437 Research Control plots John D. Byrd
1391438 Research Control plots John D. Byrd
5389533 Root(s) Nancy Loewenstein
5389534 Root(s) Nancy Loewenstein
5389535 Root(s) Nancy Loewenstein
5389623 Root(s) Nancy Loewenstein
5405123 Root(s)

Echols County

Karan A. Rawlins
5405124 Root(s)

Echols County

Karan A. Rawlins
5405125 Root(s)

Echols County

Karan A. Rawlins
5405126 Root(s)

Echols County

Karan A. Rawlins
5368028 Root(s) Carey Minteer
5368029 Root(s)

5 months after plants were sprayed with glyphosate

Carey Minteer
5368030 Root(s)

5 months after plants were sprayed with glyphosate

Carey Minteer
5362528 Root(s)

Rhizome

Carey Minteer
5344084 Root(s) Chuck Bargeron
5344085 Root(s) Chuck Bargeron
5403036 Seed(s) Rebekah D. Wallace
1391441 Seed(s) Seeds spreading along road John D. Byrd
1391444 Seed(s) Caught in barbed wire fence John D. Byrd
1391445 Seed(s) John D. Byrd
1380038 Seed(s) Chris Evans
1380034 Seed(s) Chris Evans
1380035 Seed(s) Chris Evans
1380036 Seed(s) Chris Evans
1391436 Seedling(s) In with kudzu John D. Byrd
1391423 Seedling(s) John D. Byrd
1197016 Wildfire Charles T. Bryson
1197017 Wildfire Charles T. Bryson
1197018 Wildfire Charles T. Bryson
1197019 Wildfire Charles T. Bryson


footer line
USDA Forest Service The Bugwood Network University of Georgia

Home | Image Usage | Accessibility Policy | Privacy Policy | Disclaimers | Contact Us

Last updated on Thursday, May 29, 2008 at 09:37 AM
www.forestryimages.org version 2.0, XHTML 1.1, CSS, 508.